Combined cutting and piercing tool for opening a caulking tube



FIG. 1 is a plan view of the combined cutting and piercing tool for opening a caulking tube showing my new design;

FIG. 2 is a front and, alternatively a back view of the combined cutting and piercing tool for opening a caulking tube;

FIG. 3 is a right side and alternatively, a left side view of the combined cutting and piercing tool for opening a caulking tube;

FIG. 4 is a bottom end view of the combined cutting and piercing tool for opening a caulking tube; and

FIG. 5 is a sectional view of the combined cutting and piercing tool for opening a caulking tube taken along lines 5--5 in FIG. 2. 

The ornamental design for a combined cutting and piercing tool for opening a caulking tube, as shown. 